My sister is 15 and in the past year or so has become obsessed with drawing a certain picture. It's a picture of an interrogation room and she draws it the exact same way over and over. I find notebooks with pages of this drawing all over them. Then one morning I found one of her pencils in the dish drain. I asked her if she knew how it got there and she said no. I didn't think anything of it until I looked over and saw one of the rooms drawn on the counter. When I asked her why she drew it there she aid that she didn't remember drawing it. I think she must have drawn it in her sleep. I don't know what's wrong with her but I'm beginning to worry. Do you think she's OCD?